Hi, we appreciate your concern about conserving water and re-utilising the water by softening water. In order to choose the motor pumps, various factors to be considered, like depth of bore, total height the water needs to be pumped, at what discharge rate the water needs to be pumped etc.…Various types of motor pumps like submersible, centrifugal, hydraulic pressure pumps with different power ratings are available in the market. Currently submersible pumps are dominating the industry with their simplicity, less power consumption and high efficiency. Please visit our advisory article on motor pumps for RWA http://www.slashbill.com/slashbilladvisory/index.php?/archives/29-Motor-pumps-for-ApartmentsResidential-Welfare-Associations.html